In my perspective perspective also does depend on perspective.
It`s a vague term, that`s the problem. And the youtube-guys actually talk about object distortion you can get with a wide-angle lens - but call it perspective - because perspective also can mean a subjective perception. Same section of a subject taken with a wide-angle lens will appear different, because a wide-angle lens does distort.
When these youtube-guys claim a different foal length to change "perspective" they actually mean a change in subjective perception of the subject.
But as they're youtube-guys they either don`t know better or have to keep it simple to get clicks. So they use a term everybody knows, everybody has a "feeling" for, because you know...
...perspective also does depend on perspective.
Yes, as you`re changing between worm`s eye view and bird`s eye view.